Answer :
To find the total amount Diana will pay for 4 notebooks and 6 pens, we need to multiply the cost of each item by the quantity purchased and then add these amounts together.
Let's represent the cost of one notebook as x dollars and the cost of one pen as y dollars.
The expression that represents the total amount Diana will pay is:
Total cost = (4 * x) + (6 * y)
This expression accounts for purchasing 4 notebooks at x dollars each and 6 pens at y dollars each. By multiplying the cost per item by the quantity and summing these values, we get the total cost Diana will pay.
